update tcp keep alive interval config

transport/internet/config.pb.go

@@ -420,7 +420,7 @@ type SocketConfig struct {
 	BindAddress                []byte `protobuf:"bytes,5,opt,name=bind_address,json=bindAddress,proto3" json:"bind_address,omitempty"`
 	BindPort                   uint32 `protobuf:"varint,6,opt,name=bind_port,json=bindPort,proto3" json:"bind_port,omitempty"`
 	AcceptProxyProtocol        bool   `protobuf:"varint,7,opt,name=accept_proxy_protocol,json=acceptProxyProtocol,proto3" json:"accept_proxy_protocol,omitempty"`
-	KeepAliveDuration          uint32 `protobuf:"varint,8,opt,name=keep_alive_duration,json=keepAliveDuration,proto3" json:"keep_alive_duration,omitempty"`
+	TcpKeepAliveInterval       uint32 `protobuf:"varint,8,opt,name=tcp_keep_alive_interval,json=tcpKeepAliveInterval,proto3" json:"tcp_keep_alive_interval,omitempty"`
 }
 
 func (x *SocketConfig) Reset() {
@@ -504,9 +504,9 @@ func (x *SocketConfig) GetAcceptProxyProtocol() bool {
 	return false
 }
 
-func (x *SocketConfig) GetKeepAliveDuration() uint32 {
+func (x *SocketConfig) GetTcpKeepAliveInterval() uint32 {
 	if x != nil {
-		return x.KeepAliveDuration
+		return x.TcpKeepAliveInterval
 	}
 	return 0
 }
@@ -565,7 +565,7 @@ var file_transport_internet_config_proto_rawDesc = []byte{
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@@ -589,30 +589,31 @@ var file_transport_internet_config_proto_rawDesc = []byte{
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 }
 
 var (

transport/internet/config.proto

@@ -92,5 +92,5 @@ message SocketConfig {
 
   bool accept_proxy_protocol = 7;
 
-  uint32 keep_alive_duration = 8;
+  uint32 tcp_keep_alive_interval = 8;
 }

transport/internet/sockopt_linux.go

@@ -59,8 +59,8 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 			}
 		}
 
-		if config.KeepAliveDuration != 0 {
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, int(config.KeepAliveDuration)); err != nil {
+		if config.TcpKeepAliveInterval != 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, int(config.TcpKeepAliveInterval)); err != nil {
 				return newError("failed to set TCP_KEEPINTVL", err)
 			}
 		}
@@ -92,6 +92,12 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 				return newError("failed to set TCP_FASTOPEN=0").Base(err)
 			}
 		}
+
+		if config.TcpKeepAliveInterval != 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, int(config.TcpKeepAliveInterval)); err != nil {
+				return newError("failed to set TCP_KEEPINTVL", err)
+			}
+		}
 	}
 
 	if config.Tproxy.IsEnabled() {